Optical instrument



M. WOOLF.

OPTICAL INSTRUMENT.

APPucATloN man APR. 1. |920.

Patented 0015.21922 3 SHEETS-SHEET l.

A TTHNEY M. WOOLF.

OPTICAL INSTRUMENT. APPLICATION FILED APII. I. 1920. 1,432,821 PatentedOct. 24, 1922.

3 SHEETS-SHEET 2.

Illlllllllllll er @mwfi ATTORNEY M. WOOLF. OPTICAL INSTRUMENT.yAPPLICATION FILED APR; l. 1920 Patented 00T. 24,1922.

3 SHEETS-SHEET 3.

` in its'rotat-ably adjusted position.

Patented @et afi, i922.

i' sr @nuire rara-tir carica.'

MICHAEL wooLr, or NEW Yon-rr, N. Y.

OPTICAL INSTRUMENT.

Application filed April 1,

struments of the character disclosed in myV Patent 1,240,289 and has forits main Vobjects to improve and to increase the sphere of usefulness ofsuch-instruments. l

Other objects of the invention are to facilitate interchangeability ofdifferent lens holders and to enable rapid and `accurate pupilary adjustment yThe invention involves various novel features of construction,combinations, relations and arrangements of parts, as will appear in thecourse ofthe following specification, reference beinghad to theaccompanying drawings wherein I have illustrated the invention embodiedin but one of its practical, commercial forms.

In the drawings referred to,`Figure 1 is a front elevation of thecomplete device, a portion of the .supporting head being indicated asbroken away and in section for the purposeV of showing the mountingofthe pupillary adjusting screws. l

Figure 2 isa broken detail View of the leveling mechanismrfor the head.Y l

Figure 3 is a side elevationof theinstrument. i

Figure l is a broken and partly sectional view of the supporting headand sliding lens` carriers'. g

Figure 5 is a' vertical sectional View of the cylindrical lens system astaken on substantially the plane lof line 5-5 of Figure 1. i

Figure 6 is a view of the back plate of this system as taken onsubstantially the plane of line 6-6 of Figure 5.

Figure 7 is a back View ofthe rotatable lens mount.; i' y f Figure 8 isa detached detail view of the spring member for holding the lens mountYIn the instrument disclosed,"l have utilized features ofmy patenty abovereferred to, in-

f cluding the cylindrical lens system 10. and thev 'spherical lensvsystem 11xwhichis super1mposed upon the same. In addition t0 theseylens systems l have indicated other lens 1920. Serial No. 370,371.

`mounts 12, 13 and 14 arranged, as shown in Figure lation. l

A special feature of the superimposed lens holders 10, 11, 12 and 13 isthat they are all 8, in successive superimposed resup'ported on a commonaxis about which they are independently adjustable so that each, or anyof them, can be thrown into or out of the optical axis.

This concentric mounting of the lenses will probably be most easilyunderstood from Figure 4, wherein I have shown each set of the lensholders referred to as mounted on a common supporting shaft 'or arbor15, which is shown as secured fast by means of a pin 16 in a supportingbracket 17, the construction described being duplicated for both eyes.

Fupilaryi adjustment of the two'sets of independently adjustable lensholders is ob..

p tained in my invention by mounting each of the supportingbraelzets 17on the end of a slide 1S .which operates in a guide-way providedtherefor inthe supporting head 19. The guiding passages for these twoslides are indicated at 20 and 2l in Figure fl, said passages being opento the opposite sides of the head and being shown in this disclosure asarranged one above the other.

The upper guide passage 21 is illustrated asformed by an open cut madein the top of the supporting head and Closed over by a cover plate 22which may be secured in place by means of screws 23, and which is shownas utilizedl as a support for the lens holder ldby providing it at itsforward edge with the upstanding lugs or ears 2l having bearings 25receivingthe pivot screws 2670i the lens holder. lThese Vears arefurthermore shown as formed with the angular inturned lugs 27, providingstops for limiting the upthrow of the lens holder 14;.

The slides 18 are preferablyl made rectantained 'in the constructionillustrated by means ofV the independently adjustable thumb screws 28held at ktheir inner ends by means of the set screws 29 (Fig. l) in thebores 30 provided in the head and engaging with their screw-threadedportions, screw seats formed in the forward ends 31 of the,

`down into inojierative positions.

brackets 17. These. 'forward ends of the brackets constitute Stopshoulders or abutments engaging with thesides ol" the head to limit theinward adjustment o'lf the slides.

The slidable lens carriers are, by the means` described, independently,adjustable and to facilitate and to malte possible accurate adjustmentoi these parts, l have shown `mind the provision of4 lenses ot dillerent.de-

sired types, in each set, it will be seenV that any one or allot themmay be interchanged and shifted into and out of the optical axes bysimply turning them about their common axes oit support. lnFigure 1,101'instance, I have shown the cylindrical and spherical lens systems lasturned up `in position 'for use and the' lens holders 1Q and" 13 asturned Also Vin this View AIhave illustrated the first lens holder 14 asturned downward on its pivot and hence in its inoperative position, thislatter holder turning down on fixed pivots disposed substantially atright angles to the other supporting axesl. t

For the purpose oi yieldingly securing lens holders 12 and lin thepositions to which they are adjustedyl have indicated the same assupported on the arbors '1,5 by means of the split l'rictional clampingsleeves 37 and 38 and lor the purpose oi accurately setting these lensholders inthe operative position, I4 have. illustrated cooperating stopsin thet'orm oli stop pins 30 up,- standing vtrom the supporting arborsand arranged `to be engaged b v stop shoulders 40 on the sleeve 38 or bya stop pin 41 projecting `from the face of the lens holder l2. The stopshoulders 40 tor the lens holder llare indicated as formed'by cuttingaway an arcuate portion atthe end ol the sleeve 3S which shoulders serveto limiti the throw of the lens holder 13` in bothdirections. `The stopshoulder'provided by the pin 4l on :the otherhand may limit the throwol' the lens holder 14 only in the upward-direction.

The supportingv head is usually pivotally supported on a post 42, thepivotgbeing indicated at 43. Forthe purpose of leveling Ithe head1 haveshown the same as provided with ,a dependent lug` A44 projecting belowvthe pivotal center and in between a pair of opposed spaced lugs 45, 46on the post, the first of which carries an adjusting thumb 'screw 47 andthe other ofivhieh `carries a "center at 52 on the-supporting back plateVFor theipurpose oiaccurately and lirmly seand 4.

spring-pressed plunger 48, said screw and plunger engaging the dependentlug 44 at opposite sides,-so` that by simply adjusting the thumb screwthe head may bev rocked or tiltedin either direction. The head isturthenmore shownfns provided With a spirit level 49 which enables thehead to be acculatelyy adjusted.

The lenses of the cylindrical system are *arrangedl in circular seriesas indicated particularly at 50 in Figure 7, in a rotatable carrier orwheel 51 Which is" journaledat its curing the-rotatable carrier-in theposition `to whichfit isadjusted, lIlliave shown` it as providedwith-anumber oit seats or Yrecesses- 54 aboutfthe inner periphery thereof andsubstantially corresponding innumber and position tothe lensesonfthecarrier, said seats being engaged by the projectionsorprotuberances 55 onl the ends et they radiating spring-fingers 56carried bythe holding disc` 57 which Vis secure-d `at 58 to the backplate-53. j

`From the foregoing it `will betseen that the invention provides area'dyfme'a-ns for quickly and accurately performing various tests andVfor determining the 4'nature oit lenses required.

In `order to balance the head andV the parts sujjiportedE thereby, :Iprefer to niount the piv-ot `for suchhead. on a lnacket` G0 extendinglaterallyflirom the. topfof the post 42, as indicated particularly` inFigures-3 Th'isbalancesithe head and overcomes to a large extent thetendencvfor` the head' to tilt' baekivardly orli'iiorwardly;

:VV-hat I claim-is: j

1. An optical instrument comprising a supporting head having superposed`lateral passages` slides operating in said passages, a separate screwior adjust-ing cachot. said slides independently of the other, arborssupported at the outer ends of said slides and independently adjustablelenscarriers pivotally mounted on saidk arbors.

2. In an optical instrument, pnpilarily adjustable arbors, a-pluralityotsuperimposedlens mounts pivotally engaged on each of said arbors andrictional gripping means carried by the indi viduallensmounts andyieldingly engaging :the supporting arbor to frictiona-lly retain-thesame. in adjusted relation.

- posed I lens mounts pivotally engaged on each of said -arbors,frictional gripping means carried by the individual lens mounts andyieldingly--engagingathe supportingA arbor to `trietionally retain` thesame in adj usted vrelation 4and stops :for limiting the pivotalmovementl of4 the lensl mounts onl the arbore. 4.I-n an` opticalinstrument, .pupilarily adjustable arbors, a plurality of superimposedlens mounts pivotally engaged on each of said a-rbors,frictionalgripping means carried by the individual lens mounts andyieldingly engaging the supporting arbor to frictionally retain the samein adjusted ielation,stops` for limiting the Pivo-` tal movement of thelens mounts on the ai'bors and comprising pins projecting from thearbois and shoulders carried by the lens mounts for engagement with suchpins.

5. ij-lii optical instrument comprising a head provided with lateralsuperposed passages open to oppositesides of the head, opjy positelyextensible slides operating in said passages and provided with stopabutments for engagement with the sides of the head, adjusting screwsengaged with the head at opposite sides thereof and with each of saidstop abutments to independently shift the slides for pupilary adjustmentand lens carriers mounted on the slides. j

6. An optical j instrument comprising a head provided with lateralpassages open to' opposite sides of the head, slides operating in saidpassages and provided with stop abutments for engagement with the sidesof the head, adjusting screws engaged with the head and with said'stopabutments to shift the slides for pupila-ry adjustment, lens carrieismounted on the slides, scales extending from Athe opposite sides of thesupporting head and indicators on the stop abutments registering withsaid scales.

7. An optical instrument comprising a supporting head provided with aguide pasi sage in the to-p thereof, a plate secured toA the head over`said guide passage and provided with upstanding lugs, a lens mountpivoted in said lugs and a lens carrier slid.-

mounted in said passage and extensible axially thereof, an arbor carriedon the free end of said slide and provided with upright brackets, aplurality of superimposed independently adjustable lens carrierspivotally engaged between said brackets and Vmeans for normallyyieldinglyy securing said `lens carriers in independently adjustedrelation.

l0. In an optical instrument, a post provided With opposed spaced lugs,a screw engaged in one of said lugs, a springpressed` plunger supportedin the other lug and opposed to said screw, a head pivoted on said postand provided with a lug standing between the spring-pressed plunger andscrew, pupilarily adjustable carriers mounted on the head and a set ofindependently adjustable lens mounts supported on a cem-v Amon axis oneach of said carriers.

In testimony whereof I have affixed my signature in presence of twowitnesses.

MICHAEL VVOOLF.

Witnesses i 'HUGO L. WINTNER, EMANUEL VVooLF.

